Protective cardboard corner



FIG. 1 is a perspective view of a protective cardboard corner showing our design.

FIG. 2 is a rear view of the protective cardboard corner of FIG. 1.

FIG. 3 is a front view of the protective cardboard corner of FIG. 1.

FIG. 4 is a right-side view of the protective cardboard corner of FIG. 1.

FIG. 5 is a left-side view of the protective cardboard corner of FIG. 1.

FIG. 6 is a top view of the protective cardboard corner of FIG. 1; and,

FIG. 7 is a view showing the underside of the protective cardboard corner of FIG. 1.

The protective cardboard corner is shown with a symbolic break in its length. The jagged break lines and the appearance of any portion of the article between the jagged break lines forms no part of the claimed design. 

CLAIM The ornamental design for a protective cardboard corner, as shown and described. 